august 1945, president truman's decision to use abatomic bomb against japan. tonight, we'll examine the process of making a tough decision. we'll hear about major decisions on an international stage. about corporate decisions to personal ones. from taking down the most wanted man in the world. >> the president said i'm going to go with my decision. write up the orders .. >> to giving up a dream career. >> it was a sense of lm unreality, i'm not really sure i know who i am. >> to uprooting a company culture. >> some people actually quit. >> to opening the door to a closed society. >> this is like a spy thriller. >> each of my guests have wrestled with a difficult choice. they'll take us through their deliberations, their fears and how they made their tough decisions. >> at 11:00 a.m. on may 1, 2011, two black hawk helicopters, 23 naycy sales, a translator and a dog named cairo took off from afghanistan. the mission -- to kill the world's most wanted made, osama bin laden. >> the death of bin laden marks the most significant achievement to date in an effort to d